implement event loop for console applications (heavily modified patch 1715735)

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@46029 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

src/unix/appunix.cpp

@@ -0,0 +1,77 @@
+/////////////////////////////////////////////////////////////////////////////
+// Name:        wx/unix/appunix.cpp
+// Purpose:     wxAppConsole with wxMainLoop implementation
+// Author:      Lukasz Michalski
+// Created:     28/01/2005
+// RCS-ID:      $Id$
+// Copyright:   (c) Lukasz Michalski
+// Licence:     wxWindows licence
+/////////////////////////////////////////////////////////////////////////////
+
+#include "wx/app.h"
+#include "wx/log.h"
+#include "wx/evtloop.h"
+
+#include <signal.h>
+#include <unistd.h>
+
+bool wxAppConsoleUnix::Initialize(int& argc, wxChar** argv)
+{
+    if ( !wxAppConsole::Initialize(argc,argv) )
+        return false;
+
+    if ( !m_mainLoop->IsOk() )
+        return false;
+
+    sigemptyset(&m_signalsCaught);
+
+    return true;
+}
+
+void wxAppConsoleUnix::HandleSignal(int signal)
+{
+    wxAppConsoleUnix * const app = wxTheApp;
+    if ( !app )
+        return;
+
+    sigaddset(&(app->m_signalsCaught), signal);
+    app->WakeUpIdle();
+}
+
+void wxAppConsoleUnix::CheckSignal()
+{
+    for ( SignalHandlerHash::iterator it = m_signalHandlerHash.begin();
+          it != m_signalHandlerHash.end();
+          ++it )
+    {
+        int sig = it->first;
+        if ( sigismember(&m_signalsCaught, sig) )
+        {
+            sigdelset(&m_signalsCaught, sig);
+            (it->second)(sig);
+        }
+    }
+}
+
+bool wxAppConsoleUnix::SetSignalHandler(int signal, SignalHandler handler)
+{
+    const bool install = handler != SIG_DFL && handler != SIG_IGN;
+
+    struct sigaction sa;
+    memset(&sa, 0, sizeof(sa));
+    sa.sa_handler = &wxAppConsoleUnix::HandleSignal;
+    sa.sa_flags = SA_RESTART;
+    int res = sigaction(signal, &sa, 0);
+    if ( res != 0 )
+    {
+        wxLogSysError(_("Failed to install signal handler"));
+        return false;
+    }
+
+    if ( install )
+        m_signalHandlerHash[signal] = handler;
+    else
+        m_signalHandlerHash.erase(signal);
+
+    return true;
+}